Update mysql table with an array - php

Question

I've got table: platforms
Inside this table columns: 1. first_scan_date, 2. next_scan_date 3. scan_frequency
Now, I've got such array from the web based formular:
Array
(
[scan_freq1] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
)
[first_scan_date1] => Array
(
[0] => 0000-00-00
[1] => 0000-00-00
[2] => 0000-00-00
[3] => 0000-00-00
)
[next_scan_date1] => Array
(
[0] =>
[1] =>
[2] =>
[3] =>
)
)
How can I update it in database using things that came from array in PHP? I guess I need smth like foreach, but have no clue...
UPDATE platforms (first_scan_date,next_scan_date,scan_frequency) VALUES (?,?,?)...
Help?

Answer 1

I would loop through the array to prepare a string to insert in a single query like this:
$sql = "INSERT INTO table (first_scan_date,next_scan_date,scan_frequency)
VALUES ('0000-00-00','0000-00-00',1),('0000-00-00','0000-00-00',1),('0000-00-00','0000-00-00',1)
ON DUPLICATE KEY UPDATE first_scan_date=VALUES(first_scan_date),next_scan_date=VALUES(next_scan_date),scan_frequency=VALUES(scan_frequency);";
You could do something like this:
$freq = $arr['scan_freq1'];
$date1 = $arr['first_scan_date1'];
$date2 = $arr['next_scan_date1'];
foreach ($date1 as $key => $value){
$row[] = "('".$value."','".$date2[$key]."',".$freq[$key].")";
}
$list = implode(',', $row);
$sql = "INSERT INTO table (first_scan_date,next_scan_date,scan_frequency)
VALUES ".$list."
ON DUPLICATE KEY UPDATE first_scan_date=VALUES(first_scan_date),next_scan_date=VALUES(next_scan_date),scan_frequency=VALUES(scan_frequency);";

Answer 2

Try below way
$cnt = count($arr['scan_freq1']);
for($i=0;$i<$cnt;$i++){
echo $arr['scan_freq1'][$i];
echo $arr['first_scan_date1'][$i];
echo $arr['next_scan_date1'][$i];
//now you have three values make query and update into db
$db->prepare(
"UPDATE `platforms` SET `first_scan_date`=?, `next_scan_date`=?,
`scan_frequency`= ? WHERE platformtype='os'"
)->execute(array($arr['first_scan_date1'][$i],$arr['next_scan_date1'][$i],$arr['scan_freq1'][$i]));
}

Answer 3

this may be late but may help someone in the now or the future i believe here is the shortest way to achieve this
public function update($table,$values,$where_clause)
{
foreach ($values as $key => $val)
{
$valstr[] = $key." = '$val'";
}
$update_query = 'UPDATE '.$table.' SET '.implode(', ', $valstr)
." WHERE ".$where_clause;
return $update_query;
}
found this in one of codeigniters core files it simply loops through all values
stores them in an array then converts the array into a string and adds it to the query and the where clause comes last..i hope this helps someone